Structural, characterization and AC conductivity of bis-2-amino-6-picolinium tetrachloromercurate, (C6H9N2)2HgCl4

被引：55
|
作者：
Elwej, R. [1 ]
Hannachi, N. [1 ]
Chaabane, I. [1 ]
Oueslati, A. [1 ]
Hlel, F. [1 ]
机构：
[1] Fac Sci Sfax, Lab Etat Solide, Sfax 3018, Tunisia
来源：
INORGANICA CHIMICA ACTA | 2013年 / 406卷
关键词：
(C6H9N2)(2)HgCl4; Structural materials; Chemical synthesis; Raman spectroscopy; Crystal structure; Electrical properties; ELECTRICAL-PROPERTIES; PHASE-TRANSITIONS; X-RAY; DYNAMICS;
D O I：
10.1016/j.ica.2013.06.046
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The present paper undertakes the study of (C6H9N2)(2)HgCl4, which is a new hybrid compound. It is synthesized and characterized by a single-crystal X-ray diffraction, Thermal analysis, IR, Raman and impedance spectroscopy. The non-centrosymmetric compound is crystallized in the monoclinic system with space group P2(1) and the following unit cell parameters: a = 8.907(1)angstrom, b = 15.458(9)angstrom, c = 14.019(8)angstrom, beta = 102.3(1)degrees and Z = 4. The structure can be described by the alternation of two different, cationic-anionic layers parallel to (110) plan. The cohesion of compound entities is ensured by hydrogen bonding (N-H center dot center dot center dot Cl) and pi-pi interactions. The differential scanning calorimetry reveals three peaks. Impedance spectroscopy study reveals that the polaron model or the classical hopping model is the most probable conduction mechanism. As for the temperature and frequency dependence of dielectric constants, it has been investigated to determine some parameters related to conductivity. (C) 2013 The Authors. Published by Elsevier B. V. All rights reserved.
引用
收藏
页码：10 / 19
页数：10
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